| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce powder consumption and to downsize an apparatus by a method in which raw water is subjected to anaerobic treatment in the first and second tanks and aerobic treatment in the third tank, and the treated water is stored in the fourth tank and finally disinfected in the fifth tank to be discharged outside. SOLUTION: Raw water 39 is introduced from an inflow port into the first chamber 33 of an anaerobic filter bed tank, large-sized solids in the raw water 39 are removed by a contact material 34, and simultaneously organic substances are decomposed by anaerobic and facultative anaerobic microorganisms. Next, advection water which passed through the first chamber 33 is introduced into the second chamber 35 of the anaerobic filter bed tank in which the further decomposition of organic substances and denitrification are conducted. Next, the advection water 25 which passed through the second chamber 35 is introduced into an aerobic filter bed tank 41, and in an upper section R zone, the decomposition of organic substances by aerobic microorganisms adherent to a granular carrier 14 and the nitrification of ammonia are conducted by air from a diffusing member 18. In a lower section F zone, the capture of S5 and aerobic biodigradation are conducted.</p> |
